using System;
using System.Xml;
using System.Windows.Controls;
using System.Collections.Generic;
using System.Windows.Browser;
using System.Net;

namespace ClipBoard3
{
    public partial class ClipReader : UserControl
    {
        private string titel = null;
        private string codeSnippet = null;
        private string test;
        //OrderedDictionary not implemented in Silverlight. Also, need indexes to find key/value pair. Normal Dictionary does not implement indexes.
        private List<KeyValuePair<string,string>> codeList;

        public ClipReader()
        {
            // Required to initialize variables
            InitializeComponent();


            codeList = new List<KeyValuePair<string, string>>();

            //Put all the codesnippets into the List<> instance.
            readXML();

            //Choose a snippet at random and display
            displaySnippet();
        }

        private void readXML() {
            Uri url = new Uri("codesnippets.xml", UriKind.Relative);
            WebClient client = new WebClient();
            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
            client.DownloadStringAsync(url);
        }

        private void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) {
            test = e.Result;
            if(e.Error == null) {
                using(XmlReader reader = XmlReader.Create(e.Result)) {
                    while(reader.Read()) {
                        //Only detect start elements
                        if(reader.IsStartElement()) {

                            //Get element name and switch on it
                            switch(reader.Name) {
                                case "title":
                                    titel = reader.Value.Trim();
                                    break;
                                case "code":
                                    codeSnippet = reader.Value.Trim();
                                    break;
                                default:
                                    break;
                            }

                            //If both variables have been set, we have a complete set.
                            if(codeSnippet != null) {
                                //key and value can only be assigned in the constructor
                                codeList.Add(new KeyValuePair<string, string>(titel, codeSnippet));

                                //Set them back to null
                                titel = null;
                                codeSnippet = null;
                            }
                        }
                    }
                }
            }
        }

        private void displaySnippet() {
            Random random = new Random();
            //The Next() function returns an Int32 between selected from [minValue, maxValue[
            int randomNumber = random.Next(0, codeList.Count);



            titelTxtBox.Text = HttpUtility.HtmlDecode(codeList[randomNumber].Key);
            CodeReadBox.Selection.Text = HttpUtility.HtmlDecode(codeList[randomNumber].Value);
        }

        private void makeOwnBtn_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            // TODO: Add event handler implementation here.
        }
    }
}